[Diagnostic approaches in calculi].

Diagnosis of the stone is based on anamnesis, physical examination and radiological investigation. Anamnesis and physical examination need to be supported by knowledge of the neuroanatomy of the urinary upper tract. Radiological investigation should be both non toxic and effective. Gold standard radiological examination in the evolution of urolithiasis remains the echography. Urography leads to be replaced by helical scanner less toxic and more efficient. This review tries to present the different possibilities of investigations in the diagnosis of urolithiasis.